OSRS Colosseum Solver

How to use it

Pick the wave, then set where each monster spawned: choose a spawn from the list or tap a name and then the map. Put yourself where you stand. The page reads the line of sight and range of every monster from every tile it can reach, moves each monster the way the game does until it stops, and gives the tiles where nothing can hit you and the order to clear the wave so you only ever pray against one style at a time. Tap a monster on the map to see the tiles it can hit you from and where it can walk.

The Colosseum's rules the solve follows

Spawns. Every wave spawns at random. The warband (three frems, four with Quartet) starts in the middle and runs to you around anything in the way, the berserker to your north, the seer to your east and the archer to your west, attacking only from beside you in that order on a 6 tick cycle. If you have not cleared the wave in 40 seconds the reinforcements come in through the north or south gate, whichever is nearer to you.

Line of sight and movement work as in the Inferno: a monster attacks when you are in range of its nearest tile and nothing blocks the line from you to it, and otherwise walks straight at you, so a pillar corner traps it. The shaman reaches 10 tiles and the javelin, manticore and shockwave colossi 15. The jaguar and minotaur only hit from beside you, the minotaur diagonally too. With Red Flag the minotaur walks around pillars.

Manticores charge for 10 ticks once they see you, then fire three orbs a tick apart: magic, ranged, melee or ranged, magic, melee. A second manticore that can see the first copies its order and fires 5 ticks later. Keeping them out of sight keeps them uncharged.

Minotaurs heal any monster below 75% Hitpoints whose middle tile they can see within 7 tiles, unless you stand beside them.

Sol Heredit fights in the 16 by 15 tiles inside the pillars. Each spear or shield attack covers tiles you have to step out of, and the map shows them for his next attack: after a Spear 1 the next is Spear 2 or Shield 1, after a Spear 2 it is Spear 1 or Shield 1, after a Shield 1 it is Spear 1 or Shield 2, after a Shield 2 it is Spear 1 or Shield 1, and after a phase change it is always a spear. He changes phase at 1,350, 1,125, 750, 375 and 150 Hitpoints, dropping 6 pools of molten sand within 4 tiles of you each time and adding a light beam up to four. His triple attack must be prayed against tick by tick, and from 1,125 he grapples a gear slot you have 4 ticks to defend.

Questions

Why does the solve start on a pillar? Nothing in either arena reaches through a pillar, so the tiles behind one are where you choose who can see you. Each step names the tile, who can hit you there, and why the rest cannot.

What if a monster spawned somewhere the list does not have? Tap the map to put it exactly where it stands. The solve works from wherever every monster is, so you can also use it in the middle of a wave.

Does my weapon matter? Yes. A tile only counts for a step if your weapon reaches a monster from it, and Myopia shortens every weapon but a spell you cast. With a short range the solve walks you closer and says so.

Is dying in the Colosseum safe? No. Your unprotected items go to a grave in the lobby and the run's loot is lost; a Hardcore Ironman, a Hardcore Group Ironman or a player on a Hardcore World loses their status. On the Deadman world 345 you cannot go in while skulled. The Colosseum calculator works out the loot, glory and runs to Dizana's quiver, and the Inferno solver solves the Inferno's waves the same way.